EP2057358A2 - Device for venting a crank space - Google Patents
Device for venting a crank spaceInfo
- Publication number
- EP2057358A2 EP2057358A2 EP07803097A EP07803097A EP2057358A2 EP 2057358 A2 EP2057358 A2 EP 2057358A2 EP 07803097 A EP07803097 A EP 07803097A EP 07803097 A EP07803097 A EP 07803097A EP 2057358 A2 EP2057358 A2 EP 2057358A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure control
- oil mist
- oil
- control member
- crank chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
- F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
- F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
- F01M13/023—Control valves in suction conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/0011—Breather valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0433—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a deflection device, e.g. screen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0488—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase
- F01M2013/0494—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with oil trap in the return conduit to the crankcase using check valves
Definitions
- the invention relates to a device for crank chamber ventilation in an internal combustion engine according to the preamble of claim 1.
- Such devices of the generic type are known from the practice of engine construction, especially in automotive engineering.
- the essential task of such a device is to maintain a required for technical and legal reasons negative pressure in the crankcase of the internal combustion engine by the crankcase or the crankcase is vented.
- oil components are dissolved or entrained, which are subsequently separated off in an oil mist separator and the separated oil is preferably returned to the lubricating oil circuit of the crankcase.
- the gas freed from the oil enters the intake pipe of the internal combustion engine then passes through the combustion taking place in the cylinder again.
- the invention is concerned with the problem of providing an improved or at least another embodiment for a device for crank chamber ventilation of the generic type, in which an effective oil mist separation can be achieved without great technical effort.
- This problem is solved by a device having all the features of claim 1.
- Advantageous and expedient embodiments are the subject of the dependent subclaims.
- the invention is based on the general idea of integrating an oil mist separator designed as an impactor into a throttle device or a pressure control element which is present anyway in a vent line in the case of a device for venting a crank chamber of an internal combustion engine.
- the vent line leads from the crankcase to the suction device, which serves for the extraction of blow-by gases from the crankcase, and has in the course either a throttle device or a pressure control member to limit a generated by the suction in the crankcase vacuum.
- the oil mist separator has an oil collecting space, which is connected via a valve to an oil return line via which separated oil can be supplied to the crank space again.
- This valve is preferably a so-called discontinuously operating valve, which is closed, for example, during operation of the internal combustion engine and opens only when the internal combustion engine is switched off. This can be achieved for example by a valve which closes under negative pressure and opens without negative pressure.
- the oil collection chamber of ⁇ lnebelabscheiders thus contained in the blow-by gases and separated from the oil mist separator oil is collected and then fed via the oil return line again the crankcase and thus the lubrication.
- the oil required for lubrication a closed circuit, so that an emission of oil to the environment can be almost eliminated.
- the pressure regulating member has a spring-loaded throttle valve or a resilient, rotationally symmetrical membrane. Both devices regulate a flowing through the pressure regulating member mass flow depending on the upcoming Underpressure, wherein both the throttle valve and the rotationally symmetrical membrane at a low negative pressure let pass a higher mass flow through the pressure regulating member than at a higher negative pressure.
- the resilient diaphragm expediently has a conical mandrel which, in the case of an at least partially closed pressure regulating member, passes through a passage opening in the pressure regulating member such that it forms a nozzle together with an opening edge of the passage opening, the conical spike being at least partially covered by a fleece for oil mist deposition is.
- the conical mandrel engages differently in or through the passage opening, as a result of which an annular gap arising between the mandrel and the opening edge of the passage opening has a different size.
- the mandrel can be used as a baffle wall which is coated with the aforementioned non-woven fabric for improved oil mist deposition.
- the already existing pressure control element is used simultaneously as an oil mist separator, whereby the functionality of the pressure regulating member can be significantly increased.
- separate oil mist separator can be omitted thereby, whereby on the one hand material and logistics costs can be saved and on the other a particularly compact design can be achieved.
- FIG. 1 shows a crank chamber of an internal combustion engine with a device according to the invention for crank chamber ventilation
- FIG. 2 shows a throttle device according to the invention with integrated oil mist separator
- FIG. 3 is a view as in Fig. 2, but in another embodiment,
- Fig. 5 is a representation as in Fig. 4, but with almost completely closed pressure control member.
- an internal combustion engine 1 which is shown only partially, has a crankcase 2 with a crankcase 3, which is connected to a suction device 5 via a venting line 4.
- the suction device 5 is thereby formed for sucking off blow-by gases from the crank chamber 3, wherein in the course of the vent line 4 between the crank chamber 3 and the suction device 5, a throttle device 6 or a pressure control member 7 is arranged to a generated by the suction device 5 in the crank chamber 3 negative pressure to limit.
- an oil mist separator 8 designed as an impactor is integrated in the throttle device 6 or in the pressure control element 7.
- the oil mist separator 8 is connected via an oil return line 9 to the crank chamber 3, so that oil collected by the oil mist separator 8 can be collected from the blow-by gas and fed again to the crank chamber 3.
- an emission of oil dissolved in the blow-by gases is at least reduced to the outside and, on the other hand, a virtually closed oil circuit can be created.
- an oil mist separator 8 designed as an impactor is shown, which is integrated into the throttle device 6.
- the oil mist separator 8 in this case has a baffle 10, which is preferably covered with a fleece 11 for oil mist separation.
- the fleece 11 is on a nozzle 12 opposite side of the baffle
- the fleece 11 collects the separated oil mist, which at a saturation of the web
- the valve 14 may be formed as a discontinuously operating valve and, for example, have a spring 15, which biases the valve 14 in its open direction in a non-operating state of the oil mist separator 8, while in the operating state a prevailing in the oil mist separator 8 vacuum is so great that the Valve 14 is closed against the force exerted by the spring 15 force.
- FIG. 3 shows a variant of the oil mist separator 8 or the throttle device 6 from FIG. 2, wherein a pressure regulating valve 16 is arranged instead of the nozzle 12.
- the pressure control valve 16 may for example be designed as a mushroom head valve and also has a spring 15 which biases the pressure control valve 16 in its open direction.
- the pressure regulating valve 16 opens or closes to different degrees, so that at a high negative pressure, the pressure regulating valve 16 is almost closed, while it is in its maximum open position with little or no negative pressure.
- the baffle wall 10 with the fleece 11 arranged thereon is again provided, on which the oil mist-containing blow-by gases impinge and whose oil components are preferably completely released.
- a pressure regulating member 7 is shown with a resilient rotationally symmetrical membrane 17. Die Druckfeder 7 ist mit dem Druckelement 7sky.
- the resilient diaphragm 17 is adjustable depending on the pressure along its displacement direction 18 and preferably assumes the position shown in Fig. 4 with little or no negative pressure, while preferably assumes the position shown in Fig. 5 at high negative pressure.
- the resilient diaphragm 17 has a conical mandrel 19, which passes through a passage opening 20 in the pressure control member 7 in at least partially closed pressure control member 7, that together with an opening edge 21 of the through hole 20 forms a nozzle and at least partially with a nonwoven 11 is occupied for oil mist separation.
- the blow-by gas flowing from the crank chamber 3 thus flows between the mandrel 19 and the opening edge 21 of the through-opening 20 and impinges on the web 11 arranged on the mandrel 19, whereby it loses at least a large part of its transported oil.
- the deposited oil drips downwards when the fleece 11 is saturated and flows into the oil collecting space 13, from where it is discharged in a known manner discontinuously via the valve 14 into the oil return line 9.
- a mandrel 19 opposing counter punch 22 is arranged, on which at high negative pressure of the mandrel 19 of the membrane 17 is applied.
- Such a system is in particular in a closed pressure control member 7 of the case, in which case the counter-22 presses in the web 11 of the mandrel 19.
- the membrane 17 is covered with an elastomer 23 which, when the pressure regulating member 7 is closed (see FIG. 5), bears tightly against a rotationally symmetrical peripheral bead 24 of the passage opening 20 and thereby closes the venting line 4.
- a nozzle-like constriction is formed by the elastomer 23 on the one hand and by the peripheral bead 24 on the other hand, the passage cross-section changes pressure-dependent, so that at low negative pressure, the passage cross section between the elastomer 23 and peripheral bead 24 is large, while it is small at large negative pressure or completely Zero sinks.
- an impact wall 10 'acted upon by oil mist is also or alternatively covered with a fleece 11 for separating the oil mist. It is only important here that the intended for oil mist separation baffle 10, 10 'is located where possible at the point at which a flow velocity of the blow-by gases is greatest.
- the oil mist separator 8 integrated according to the invention into the throttle device 6 or into the pressure control element 7 can be part of a cylinder head cover (not shown) or integrated into it, as a result of which Functionality of the cylinder head cover can be increased. It is also conceivable that the present invention integrated in the throttle device 6 or in the pressure control member 7 oil mist separator 8 is integrated in a cylinder head cover.
- the invention proposes to integrate a ⁇ lnebelabscheider 8 in an existing anyway in a vent line 4 pressure control member 7 or in a throttle device 6 and thereby space-minimizing and to arrange aerodynamically favorable position in the vent line 4 between the suction device 5 and the crank chamber 3.
- a separate arrangement of a ⁇ lnebelabscheiders 8 can be omitted, which on the one hand assembly and material costs can be saved and on the other already scarce space can be better utilized.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006041213.3A DE102006041213B4 (en) | 2006-09-02 | 2006-09-02 | Device for crank chamber ventilation |
PCT/EP2007/059091 WO2008028863A2 (en) | 2006-09-02 | 2007-08-31 | Device for venting a crank space |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2057358A2 true EP2057358A2 (en) | 2009-05-13 |
EP2057358B1 EP2057358B1 (en) | 2010-08-04 |
Family
ID=38986921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07803097A Expired - Fee Related EP2057358B1 (en) | 2006-09-02 | 2007-08-31 | Device for venting a crankcase |
Country Status (5)
Country | Link |
---|---|
US (1) | US8893688B2 (en) |
EP (1) | EP2057358B1 (en) |
JP (1) | JP4961477B2 (en) |
DE (2) | DE102006041213B4 (en) |
WO (1) | WO2008028863A2 (en) |
Families Citing this family (42)
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DE202007014378U1 (en) * | 2007-10-12 | 2009-02-26 | Hengst Gmbh & Co.Kg | Oil mist separator of an internal combustion engine |
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DE102008044857B4 (en) * | 2008-05-09 | 2011-08-25 | Montaplast GmbH, 51597 | Device for separating oil particles from the crankcase ventilation gas of an internal combustion engine |
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JP2010248934A (en) * | 2009-04-10 | 2010-11-04 | Toyota Boshoku Corp | Oil separator |
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DE102010029322B4 (en) * | 2010-05-26 | 2020-06-04 | Hengst Se | Pressure relief valve of a device for venting the crankcase of an internal combustion engine and device with such a pressure relief valve |
EP2390477B1 (en) | 2010-05-26 | 2012-12-05 | Fiat Powertrain Technologies S.p.A. | Separator device for a system for recirculation of the blow-by gases of an internal combustion engine |
DE102010034615A1 (en) | 2010-08-18 | 2012-02-23 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Oil separator for separating engine oil from blow-by-gases of internal combustion engine of motor car, has V-shaped splitter arranged between inlet and outlet, and baffle plates arranged in flow direction opposite to sub-channel outputs |
DE102010062321B4 (en) | 2010-12-02 | 2023-10-12 | Elringklinger Ag | Oil separator unit |
GB201113072D0 (en) * | 2011-07-29 | 2011-09-14 | Parker Hannifin Mfg Uk Ltd | A separator |
JP6000552B2 (en) * | 2012-01-19 | 2016-09-28 | ヤンマー株式会社 | Engine equipment |
CN106150978B (en) | 2012-02-27 | 2020-02-28 | 纳博特斯克汽车零部件有限公司 | Oil separator |
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DE202015008392U1 (en) * | 2015-12-04 | 2017-03-07 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Separating device, housing part with separation device and use of the separation device in an internal combustion engine |
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JP6900154B2 (en) * | 2016-04-26 | 2021-07-07 | ヤンマーパワーテクノロジー株式会社 | Engine equipment |
CN109072740B (en) * | 2016-04-26 | 2021-09-10 | 洋马动力科技有限公司 | Engine device |
DE202016104363U1 (en) * | 2016-08-08 | 2017-11-10 | Woco Industrietechnik Gmbh | Valve |
JP6729285B2 (en) * | 2016-10-19 | 2020-07-22 | トヨタ紡織株式会社 | Oil mist separator |
JP6790870B2 (en) * | 2017-01-25 | 2020-11-25 | トヨタ紡織株式会社 | Oil mist separator |
JP6826009B2 (en) * | 2017-08-08 | 2021-02-03 | 株式会社ニフコ | Oil separator |
JP7124323B2 (en) * | 2018-01-25 | 2022-08-24 | トヨタ紡織株式会社 | oil mist separator |
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US11293315B1 (en) * | 2020-12-31 | 2022-04-05 | Sogefi Air & Cooling Usa, Inc. | Air-oil separator drain valve and related method of use |
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-
2006
- 2006-09-02 DE DE102006041213.3A patent/DE102006041213B4/en not_active Expired - Fee Related
-
2007
- 2007-08-31 EP EP07803097A patent/EP2057358B1/en not_active Expired - Fee Related
- 2007-08-31 JP JP2009526111A patent/JP4961477B2/en active Active
- 2007-08-31 US US12/439,416 patent/US8893688B2/en not_active Expired - Fee Related
- 2007-08-31 WO PCT/EP2007/059091 patent/WO2008028863A2/en active Application Filing
- 2007-08-31 DE DE502007004667T patent/DE502007004667D1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2008028863A2 * |
Also Published As
Publication number | Publication date |
---|---|
DE502007004667D1 (en) | 2010-09-16 |
DE102006041213A1 (en) | 2008-03-06 |
DE102006041213B4 (en) | 2017-06-29 |
US20100006075A1 (en) | 2010-01-14 |
WO2008028863A2 (en) | 2008-03-13 |
EP2057358B1 (en) | 2010-08-04 |
US8893688B2 (en) | 2014-11-25 |
JP2010501788A (en) | 2010-01-21 |
WO2008028863A3 (en) | 2009-05-22 |
JP4961477B2 (en) | 2012-06-27 |
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